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Overview

Description

A winner right out of the gate - multi-time magazine shootout winner, National MX Champion and West Region SX Champion. The YZ250F is even better for 2016.

Top Features

Innovative Engine, Updated for More Top-End Power: Liquid-cooled, DOHC 4-valve, fuel-injected engine with the same forward-positioned, straight intake, rear-inclined cylinder and rear positioned exhaust layout as the YZ450F – now with further optimized crank balance and even more advanced piston technology between the cases.

Advanced Fuel Injection: The four-titanium-valve cylinder head is matched to a battery-less fuel injection system that provides optimized power at any rpm. The fuel injection system instantly adjusts the air/fuel mixtures depending on altitude and temperature, for a hesitation-free engine that delivers no matter the conditions.

Wraparound Rear Positioned Exhaust Layout: The exhaust pipe has an innovative layout, circling the cylinder, giving the exhaust pipe proper length for an excellent exhaust pulse effect. At the same time, the exhaust pipe has three different diameters throughout the exhaust tract, bringing out excellent power characteristics. This layout allows the silencer to be moved forward, behind the side panel, making it closer to the middle of the bike for centralized mass for superior handling.

Mass-Centralized Ergonomics: The layout of the seat, fuel tank, air box, and wrap-around exhaust system moves the bike’s mass towards the center for exceptional handling. The front intake layout with large air filter element adds the benefit of reduced air filter maintenance due to its positioning away from dirt roost from the rear wheel.

GYTR® Power Tuner Ready: Accessory GYTR® Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions in a matter of seconds with the push of a few buttons, as well as monitor engine diagnostic codes.

New for 2016

New Piston: A new lightweight forged two-ring piston uses a flat piston crown surface with additional strengthening ribs and a shorter, more durable piston pin with diamond like carbon (DLC) coating. The new piston is lighter, significantly stronger and together with revised EFI mapping, improves combustion performance for a faster, more thorough burn, resulting in excellent pulling power.

New Oil Jets: Revised piston oil jets direct oil underneath the new piston, to help promote cooling and contribute to more stable engine performance.

New ECU: New ECU settings provide smoother transition as the rider reaches the rev limiter.

New Brakes: New 270mm front disc brake, up from 250mm, uses new brake pad material for exceptional stopping power and control for aggressive corner entries.

Updated Suspension: New suspension settings front and rear are designed to eliminate sudden jolts and better control front-end dive, for a smoother, more balanced damping feel through the corner.

Engine Features

Innovative Engine Design: A liquid-cooled, DOHC 4-valve, fuel-injected engine with the same forward-positioned straight intake, rear-inclined cylinder and rear positioned exhaust layout as the YZ450F. The engine, with its straight and symmetrical intake and exhaust ports and compact, high compression combustion chamber, delivers outstanding engine character in the high speed range.

Advanced Fuel Injection: The adjustable fuel injection system uses a 44mm throttle body fed by a high-pressure battery-less electric fuel pump. This ensures optimum fuel atomization and air/fuel calibration for excellent rideability in a wide range of riding conditions. The system controls the volume of fuel injected and the ignition timing based on engine rpm and throttle opening, providing hesitation-free response and controllability.

New Piston, Rod and Crankshaft Balance: The all-new, flat-top designed forged piston now features a bridge-box design for additional strength, yet is even lighter for 2016. The piston, rings and new DLC-coated piston pin, along with the offset cylinder configuration, all reduce friction loss and contribute to quick response, while the updated oil cooling jet ensures high rpm reliability. As before, the YZ250F’s intake/exhaust ports, cam profiles, ECU, carburized crank and newly optimized balance ratios for the crank and balancer all work together to create the YZ250F’s outstanding engine character with more power in the high-rpm range.

Wraparound Rear Positioned Exhaust Layout: As with the YZ450F, an innovative exhaust pipe design is adopted to increase mass centralization and improve power development characteristics. This layout moves the rear end of the exhaust pipe farther forward and enables a muffler position close to the center of the mass. Adjustments are made in the pipe diameter in its various sections resulting in excellent exhaust pulse effect that contributes to high rpm power output, while a new muffler bracket reduces weight.

Compact Engine Layout: The compact wet sump lubrication system with new piston cooler spray jet maintains excellent engine durability and eliminates the need for an oil tank, which lowers engine weight. This creates a more compact engine that contributes to mass centralization and unmatched handling.

Updated Clutch: The clutch and shift mechanisms are updated for 2016 to reduce drive-force loss during gear changes and produce smoother shift action under the heavy demands of motocross racing.

GYTR® Power Tuner Ready: Accessory GYTR® Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions in a matter of seconds with the push of a few buttons, as well as monitor engine diagnostic codes.

Chassis/Suspension

Mass-Centralized Exhaust System: The aluminum muffler is positioned closer to the machine’s center of gravity as it is almost completely hidden by the side number plate. The layout contributes to centralized mass for a lightweight handling feeling.

Updated Suspension Settings: Industry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping features revised valving for improved suspension feel and balance in each section of a corner, from entrance to exit. The KYB® rear shock also features settings optimized for ideal damping characteristics.

New 270mm Front Brake: A new 270mm front brake disc is the same system fitted to the 2016 YZ450F and is a huge 20mm larger than the disc fitted to the 2015 model, using an all-new pad material for exceptional stopping power and braking control.

Compact Fuel Tank and Air Box: The Yamaha-exclusive fuel tank and air cleaner box layout positions the fuel tank mass closer to the center of the bike which improves handling feel. Furthermore, the air box is positioned in front, away from the dirt kicked up from the rear wheel and can be accessed without tools for easy serviceability of the air cleaner.

Additional Features

Embedded Graphics: Yamaha’s unique embedded graphics are built into the bodywork for extended durability, resisting both peeling and damage.

Fuel economy estimates are based on US EPA exhaust emission certification data obtained by Yamaha. Your actual mileage will vary depending on road conditions, how you ride and maintain your vehicle, accessories, cargo and operator/passenger weight.
Wet weight includes the vehicle with all standard equipment and all fluids, including oil, coolant (as applicable) and a full tank of fuel. It does not include the weight of options or accessories. Wet weight is useful in making real-world comparisons with other models.